Paper Title:
Localized Deformation in Neutron-Irradiated Zirconium and Zircaloy-4
  Abstract

The effects of neutron-irradiation near 80°C on the deformation behavior of hexagonal close packed (hcp) materials, zirconium and zircalloy-4, were investigated by transmission electron microscopy (TEM). Particular emphasis is placed on the deformation microstructure responsible for the changes in mechanical behavior. Neutron irradiation at low temperature up to 1 dpa induced a high number density of defect clusters, which resulted in irradiation-induced hardening. Dislocation channel deformation is observed for doses greater than 0.1 dpa, and is coincident with prompt plastic instability at yield. TEM analysis suggests that the loss of work hardening capacity in irradiated zirconium and zircaloy-4 at higher doses is mainly due to dislocation channels that are formed under a high local resolved shear stress, leading to the observed localized deformation.

  Info
Periodical
Materials Science Forum (Volumes 561-565)
Main Theme
Edited by
Young Won Chang, Nack J. Kim and Chong Soo Lee
Pages
1769-1772
DOI
10.4028/www.scientific.net/MSF.561-565.1769
Citation
N. Hashimoto, T.S. Byun, "Localized Deformation in Neutron-Irradiated Zirconium and Zircaloy-4", Materials Science Forum, Vols. 561-565, pp. 1769-1772, 2007
Online since
October 2007
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Price
$32.00
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